My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ54CAHE3/5A
- Part No.:
- SMAJ54CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54CAHE3/5A.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,537
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ54CAHE3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 54 V standoff voltage (VWM), 60–66.3 V breakdown range (VBR), 87.1 V maximum clamping voltage (VC) at 4.6 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive ECUs, industrial sensor interfaces, and telecom line protection.
For engineers reviewing the SMAJ54CAHE3/5A datasheet, SMAJ54CAHE3/5A pinout, SMAJ54CAHE3/5A application, or SMAJ54CAHE3/5A equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, SMA (DO-214AC) package compatibility, and thermal resistance (RθJA = 120 °C/W) for surface-mount PCB layout under surge duty cycles.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: during transients exceeding VWM = 54 V, it avalanches symmetrically in both directions to clamp the line at ≤87.1 V. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at VWM), while the unmarked SMA package reflects its bidirectional polarity.
Designed for repetitive surge immunity, SMAJ54CAHE3/5A delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold. It meets J-STD-020 MSL Level 1 (260 °C reflow peak) and supports automated SMT placement with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 60.0 V / 66.3 V at 1.0 mA - Confirmed bidirectional avalanche onset tolerance band |
| VC @ IPPM | 87.1 V at 4.6 A - Clamped voltage during 10/1000 μs surge, defining protected circuit stress limit |
| PPPM | 400 W - Peak transient power handling capability at TA = 25 °C, 0.01 % duty cycle |
| IFSM | 40 A - Non-repetitive forward surge rating (unidirectional only; not applicable here due to bidirectional construction) |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Case conforms to UL 94 V-0 flammability rating; terminals are matte tin-plated for solderability per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional polarity - either end connects to protected line; clamping occurs identically in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| 400 W peak pulse power | Withstands IEC 61000-4-5 surge events (10/1000 μs) on 12 V/24 V vehicle power rails |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or microcontrollers |
| MSL Level 1 rating | Supports lead-free reflow assembly without moisture-induced popcorn failure |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed upstream of DC/DC converters and LDOs. Use Value: Limits voltage excursions to ≤87.1 V during 400 W surges, preserving regulator input stage integrity and preventing latch-up. | Use Scenario: Safeguarding analog outputs (4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional clamping element across signal and return lines to suppress ESD and inductive kickback. Use Value: Maintains signal fidelity by clamping transients within ±87.1 V without polarity-dependent installation errors. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Shielding RS-485 transceiver bus lines in base station backhaul equipment from lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair, coordinated with secondary GDT or polymer PTC. Use Value: Responds in <1 ps to clamp common-mode transients, reducing risk of transceiver latch-up or permanent damage. | Use Scenario: Adding robustness to USB 2.0 VBUS and data lines in smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Board-level ESD suppressor meeting IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact). Use Value: Achieves sub-100 ns response and low leakage (<1 μA), ensuring no impact on USB enumeration or signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54CA-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy | Choose SMAJ54CA-M3/5A if halogen-free materials are required; otherwise SMAJ54CAHE3/5A satisfies standard automotive and industrial requirements. |
| SMCJ54CAHE3/5A | Higher 1500 W peak pulse power rating in larger SMC (DO-214AB) package; same VWM, VBR, and VC | Used where higher surge energy absorption is needed (e.g., battery input stages), but requires larger PCB footprint | Select SMAJ54CAHE3/5A for space-constrained designs needing 400 W protection; choose SMCJ54CAHE3/5A only when 1500 W capability is verified necessary. |
Compared with SMAJ54CA-M3/5A, SMAJ54CAHE3/5A offers identical surge performance with standard RoHS compliance; versus SMCJ54CAHE3/5A, it trades lower power rating for 40 % smaller board area and compatible reflow profile - critical for compact automotive modules and portable industrial sensors.
Availability
SMAJ54CAHE3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning circuits, and telecom infrastructure surge protection requiring stable component supply across multi-year production programs.
Supply support for SMAJ54CAHE3/5A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The SMAJ series is engineered specifically for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping behavior and AEC-Q101 qualification are mandatory.
FAQ
What does the "CA" suffix indicate in SMAJ54CAHE3/5A?
The "CA" suffix denotes a bidirectional configuration: SMAJ54CAHE3/5A clamps voltage symmetrically in both polarities, making it suitable for AC signal lines, floating buses, or differential interfaces where polarity cannot be guaranteed. Unlike unidirectional variants (e.g., SMAJ54A), it has no cathode marking and exhibits identical VBR and VC in either direction - confirmed in the Vishay datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SMAJ54CAHE3/5A qualified for automotive use?
Yes, SMAJ54CAHE3/5A is AEC-Q101 qualified, as explicitly stated in the Vishay document under "MECHANICAL DATA" and "ORDERING INFORMATION". The "HE3" suffix indicates RoHS-compliant and AEC-Q101-qualified construction, validated for use in engine compartments, infotainment systems, and ADAS modules where temperature cycling, vibration, and long-term reliability are critical.
What is the maximum clamping voltage of SMAJ54CAHE3/5A under surge conditions?
The maximum clamping voltage (VC) of SMAJ54CAHE3/5A is 87.1 V, measured at its rated peak pulse current (IPPM) of 4.6 A using the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is specified in the "ELECTRICAL CHARACTERISTICS" table for device SMAJ54A - applicable to SMAJ54CAHE3/5A per family-wide parameter alignment.
Can SMAJ54CAHE3/5A replace SMAJ54A in a design?
No - SMAJ54CAHE3/5A cannot directly replace unidirectional SMAJ54A without circuit review. While both share VWM = 54 V and similar VC, SMAJ54A is unidirectional (cathode-marked) and conducts forward current, whereas SMAJ54CAHE3/5A is bidirectional (no marking) and blocks in both directions until breakdown. Substitution requires verifying line polarity, grounding scheme, and whether forward conduction is required in the original design.
What package type does SMAJ54CAHE3/5A use, and what are its mounting requirements?
SMAJ54CAHE3/5A uses the SMA (DO-214AC) surface-mount package, with dimensions per the "PACKAGE OUTLINE DIMENSIONS" drawing: 4.50 mm × 2.79 mm × 2.29 mm. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated 400 W pulse power dissipation, and complies with J-STD-020 MSL Level 1 for lead-free reflow up to 260 °C peak temperature.
SMAJ54CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 4.6A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ54CAHE3/5A FAQ
1.How can I place an order for SMAJ54CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54CAHE3/5A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMAJ54CAHE3/5A reliable?
The price and inventory of SMAJ54CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ54CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ54CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54CAHE3/5A?
SMAJ54CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54CAHE3/5A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMAJ54CAHE3/5A?
For technical support, including SMAJ54CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ54CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ54CAHE3/5A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMAJ54CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ54CAHE3/5A?
All SMAJ54CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54CAHE3/5A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMAJ54CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ54CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ54CAHE3/5A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
